forces it's extremely worrisome and scary. >> reporter: stephanie stanton, nbc news, los angeles. it was a day of heated question for the man president obama wants to head the cia. john brennan was pressed hard on the use of drones and enhanced interrogation techniques by members of the senate intelligence committee. government memos leaked earlier this week showed drones had been cleared for use against u.s. citizens suspected of working as u.s. terrorists. nbc's tracie potts is live. good morning. >> reporter: good morning, everyone. in his hearing, brennan strongly defended the use of drones but he distanced himself from questionable interrogation tactics used on terror suspects. >> truth, the full truth and nothing but the truth. >> reporter: it looks like john brennan is gaining the support of several lawmakers, on drone attacks and even americans. at least three killed so far.